Dark chocolate Diet, nutrition & food Dark chocolate is healthy as it contains number of vitamins and minerals like potassium, copper, magnesium and iron. Lowers blood pressure Dark chocolate improves blood flow and help to prevent the formation of blood clots. It may also prevent arteriosclerosis. A small amount of dark chocolate two or three times each week can helps to lower your blood pressure. Lowers the risk of stroke Dark chocolate increases blood flow to the brain so it helps to improve cognitive function. It also helps to reduce your risk of stroke. Helps in diabetes: Dark chocolate helps to keep blood vessels healthy and circulation unimpaired to protect against type-2 diabetes. The flavonoids in dark chocolate also help reduce insulin resistance by helping your cells to function normally and regain the ability to use your body's insulin efficiently. Acts as antioxidant: Dark chocolate is loaded with antioxidants which keeps body free of free radicals and prevent oxidative damage to cells. And it also acts as an anti-aging effect. Improves mood: Your mood will be improved and you will feel happier as chocolate contains phenylethylamine (PEA), the same chemical that your brain creates when you feel like you are falling in love.